Car-truck.



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APPLIGATION FILED D'B0.1'I, 1906.

No. 865,492. PATENTED SEPT. 10. 1907.

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PATENTED SEPT. 10, 1907. H.S.HART.

GAR TRUCK.

v APPLICATION FILED DEO.17, 1906.

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UNITED STATES HARRY S. HART, OF CHICAGO, ILLINOIS.

CAR-TRUCK.

Specification of Letters Patent.

' Patented Sept. 10, 1907.

Application filed December 17, 1906. Serial No. 348,268.

To all whom it may concern.-

Be it known that I, HARRY S. HART, a citizen of the. United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Car-Trucks, of which the following is a specification.

The object of my invention is to provide a simple and substantial structure embodying means whereby the truck bolster can be separated from'the side frame of the truck without separating the different parts of said frame. The structure which I have devised meets these requirements and is of such a character that the side frame may consist of an integral structure, preferably of cast steel. The invention may, however, be embodied in side frames of the usual structure. Its special advantage, however, consists in the fact that its use renders it possible to construct the side frame of a single casting.

In the drawingsFigure l is a side elevation of a truck constructed according to my invention. Fig. 2 is a plan view of the same, partly in section. Fig. 3 is a side elevation partially in section of the central part of the side frame of a truck showing my invention applied to a different form of bolster. Fig. 4 is a plan view of the structure shown in Fig. 3, a portion of the view being in section on the line 4 of F ig. 3.

In the form of my invention illustrated in Figs. 1 and 2 of the drawings, the bolster e is provided near its ends with transverse grooves or keyways s. (.orresponding grooves are formed in the inner faces of thecolunms d and extend from the top thereof to a point u about midway between the upper and lower ends of the columns. The upper arch bar of the side frame is formed with openings 'm registering with the grooves or keyways it. These openings are of suflicient size to admit the keys 1', which are designed to project from the grooves t a suflicient distance to co-act with the grooves s in the bolster.

It will be understood that my invention is not necessarily restricted to this specific construction, butthat the grooves or koyways L might extend throughout the height of the columns and the openings or might, if de sired, be made in the lower member of the side frame instead of the upper member, suitable means being provided in that event for retaining the members 1' against displacement.

In assembling the parts the end of the bolster c is insorted between the columns d so that the keyways s and properly register, whereupon the keys or locking members r are driven into position through the openings m. It will be apparent that by this construction the bolster is secured against longitudinal movement but permitted the necessary movement upon the springs g.

In Figs. 3 and 4 I have shown my invention in connection with a different form of bolster. The bolster shown is provided with locking lips j, which, instead of directly engaging the columns (I, engage the removable interlocking members Ic mounted thereon. These interlocking members are similar in construction and in their relations to the side frame and bolster to those described in connection with the construction shown in Figs. 1 and 2. Instead, however, of coacting with rectangular grooves or keyways in the bolster they coact with the lips j. As in the case of construction shown in Figs. 1 and 2 the grooves land locking members I: may either extend through part of the length of the columnas illustrated in Fig. 3-or may extend throughout the column, and openings for the insertion of'the locking members I: may, if desired, be provided in the lower instead of the upper member of the side frame.

In either of the constructions illustrated it is necessary when it becomes desirable to remove the bolster to simply draw out the interlocking members 1' or 7c, thus obviating the necessity of disarranging the structure of the truck. It will be apparent that instead of providing removable locking members upon both sides of the bolster I may provide rigid locking means integral with the column upon one side and upon the opposite side locking members of such width that when removed the bolster may be moved sidewise sufficiently to disengage it from the rigid locking members.

What I claim is:

1. In combination, a truck frame provided with an opening, and a bolster provided with projections adapted to engage the opposite sides of the truck frame adjacent the opening therein, the portion of the truck frame engaged by said projections consisting of keys engaging rooves in the truck frame.

2. A side frame having an opening in one of its arch bars, and a registering groove in the inner face of the column, in combination with a bolster and a locking member co-ncting with said bolster and said groove.

2;. In combination, a side frame having an opening in its upper member. a column provided with a groove registering with said opening, a bolster, and a locking member co-acting with said groove and the bolster.

4. In combination, a side frame having an opening in its upper member, a column provided with a groove regis tvring with said opening, and a locking member supported by the end of the groove and co-acting with a groove in the bolster.

In combination, a side frame having an opening in its upper member, a column provided with a groove registering with said opening, a bolster provided with a groove, and a locking member concting with said groove.

G. A side frame having an opening in one of the arch bars, in combination with a locking member inserted in said opening and engaging the bolster.

T. In a car, a bolster, a side frame provided with an opening to receive the bolster, the side walls of said opening being provided with key-ways, the upper wall of said opening having perforations communicating with said keyways. and keys cooperating with said key-ways and said bolster.

HARRY S. HART.

Witnesses W. A. ScoT'r, JENNIE A. MAcEnwAno. 

